Mitsubishi MMT16IRA60-S VP15TF Internal Threading Insert
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MMT16IRA60-S VP15TF
Mitsubishi Materials | Internal Partial Profile 60° (Metric / UN / UNC / UNF)
The Mitsubishi MMT16IRA60-S VP15TF is a versatile internal threading insert designed for 60-degree profiles. As a partial profile A-type insert, it provides the flexibility to machine various pitches ranging from 0.5mm to 1.5mm (48 to 16 TPI) with a single tool. This makes it an essential component for CNC threading of internal Metric and Unified National (UN) threads. Featuring the -S type 3D molded chipbreaker and the proprietary VP15TF Miracle PVD coating, it is engineered for precision and longevity when threading stainless steel, carbon steels, and alloyed materials.
Technical Specifications
| ISO/Metric Designation | MMT16IRA60-S |
|---|---|
| Thread Profile | 60° Partial Profile (Internal) |
| Pitch Range | 0.5 - 1.5 mm / 48 - 16 TPI |
| Insert Size (IC) | 9.525 mm (3/8") |
| Grade / Coating | VP15TF (Miracle Al-Ti-N PVD) |
VP15TF Miracle Grade
The VP15TF grade is the industry benchmark for indexable threading. It combines a tough carbide substrate with Mitsubishi's Miracle (Al-Ti-N) PVD coating. This provides exceptional resistance to built-up edge (BUE) and plastic deformation, ensuring stable tool life even when machining stainless steel (SUS304/316) and other gummy materials.
-S Type 3D Chipbreaker
Internal threading is notoriously difficult for chip evacuation. The -S molded chipbreaker utilizes a specialized 3D rake geometry to curl chips into tight, manageable spirals. This allows coolant to easily flush chips out of the bore, preventing "chip nesting" and protecting the thread surface finish from scratches and recutting.
Recommended Cutting Parameters
| Workpiece Material | Cutting Speed ($v_c$) | Typical No. of Passes |
|---|---|---|
| Carbon Steel (S45C) | 90 - 160 m/min | 6 - 12 |
| Stainless Steel (304/316) | 70 - 130 m/min | 8 - 14 |
| Alloy Steel (SCM440) | 80 - 140 m/min | 7 - 13 |
MMTIR INTERNAL TOOLING SYSTEM
This 16IR insert is optimized for use with Mitsubishi MMTIR internal boring bars and all standard 16mm (3/8" IC) internal threading holders.
Shop MMTIR Internal Bars →Metric vs. Inch Cross-Reference
| Feature | Metric Designation | Inch Designation (ANSI) |
|---|---|---|
| Insert Size | 16 IR | 16IR (3/8" Inscribed Circle) |
| Max Pitch Range | 1.5 mm | 16 TPI |
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.